Sign.



0. BOEHM.

SIGN.

APPLIGATION HLBD AUG.17,1908.

9 l 9, 3 1 O. Patented Apr. 27, 1909 UNITED STATES PATENT OFFICE.

OSCAR BOEHM, OF NEW YORK, -N. Y. s l i SIGN.

Specicat'ion of Letters Patent. applicati@ med August 17, isos.' 'seauNo. 44u91. l

ratpntd prix 27, 1909.

. useful Improvements in Signs, of which the following 1s aspecification. f

This invention relates to a sign the letter or ornaments of which arecomposed ofglass bodies provided with a light-re ecting backlng. y

The invention more particularly relates to excluding atmospheric air andmoisturefrom the backing, so that any oxidation or corrosion of the sameis prevented.

In the accompanying drawing: Figure 1 is a front view of part of a signembodying my invention; Fig. 2 an enlargedy cross. section on line 2 2,Fig. 1; Fig. 3 a-front view of a v modified form of a sign-letter; Fig.4 a side view thereof, and Fig. 5 a cross section on line 5 5, Fig. 3. l

The various letters of the sign illustratedl in Figs. 1 and 2, arecomposed of aseries ofv hollow closed bodies 10 of glass or other transarent material. each ody 10 is provided Wlth a light-reflectingbackmg11, such as a layer of metallic.

silver. The light-rays in striking the refleeting bodies 10, will givethem a most brilliant appearance. The bodies may either be of plain orcolored glass, so that dillerent instance, etters of hght-brown glass,provided with a silver backing will have the ap earance of brilliantgold letters.

cdies 10 are closed, as above stated, and are evacuated to positiv-elinsure the absence of all moisture from t e interior thereof. By suchclosingl of the bodies, the outer atmospheric air' and moisture. ispermanently prohibited from coming into contact with .the reflectinglayer 11, so that -any oxidationor corrosion of the saine is pre-`vented. v- Bodies 10 are shown to be made in the spint of my invention.

During the process of manufacture, h j

The inner vsurface of obtained. Thus for.

sha e desired, whereupon the inner surface mf t e bulb-'Wall is rovidedwith the silver bulb 1o is' as@ blovmffr molfia'iimo um rareiied, and'all vmoisture removedv vtherefrom 'by externall heating the bulb for ,a

sired to f create ahigher vacuum withinthe bulb, thel air ,mayg bewithdrawn therefromV le pump, whereupon 'teat 13 is. sealed.. x `f noveland eiective means for permanently by a suits.

A 'sign board -i'lii'serves for the support of M5, bulbs 10fo'rwhichpurpose said boar is] ro- -1 vided with coniform perforations or4soc ets 15adapt`ed for thereception'ofjthetapering' 1 ends12ofbulbsff10. Asuitable paste or ce'- v' ment 16 maybe introduced into,erforations 15 lto ll the s ace not occupied y bulbs 1Q.

glass body17,.whi'ch is shaped corresponding `while `a reflecting layer19 covers'theinner surfaceaof the bod `Wall. f

1t will be seen at by my invention, the sign retains its brilliancyfor(an unlimited] time, asthelatmospheric air and moisture'is andeffectively excluded froml the oxidiza le backing, soy that nodestruc-.l

tive viniuenceswill act thereon. The sign may Ythus fbe cleaned, rwashedandY scrubbed crease. WhatIclaim,is: l 1. -In a s1 a hollow transparent4'body-,f

e5 Aas oftenas desired, Lwlthout running anyrisk that the-brilliancy.thereof will ever de'ifv 9c i l said body belng exhaustedtoformavacuuml 1- chamber, and a lightreflector fwithinjsaid chamber,substantiallyas speciiied.

2. Inasign' ent body, and 'a lighterefi'ecting coating on vtheinnensurface thereof, substantially as specified. i'

' Signed by meat New Yorkf Y.,

12th day ot .August`1908 .fifWitneSsem v E. Zmn,

vosunascarna. A

a' sealed evacuated transpar-

